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- W2134225742 abstract "Airbag inflator functioning is submitted to draconian safet y rules for vehicle occupants. The bag inflating process is ensured by a pyrotechnic system which delivers combustio n gases very quickly. Prior manufacturing, the inflator consisted of a thin tube closed at both extremities, crimpedand perforated with exit ports for combustion gas release, undergoes validation tests. Ones called burst tests , consist in putting inflator combustion chamber (without exit ports) under various dynamic pressure ramps until stru cture failure. The work presented in this paper aims at predicting by numerical simulation the inflator responseduring dynamic loading in order to optimize its development and decrease the costs induced by validation tests. M any mehanical tests have been carried out showing significant plastic hardening and viscosity whith plastic d uctile damage. The GTN (Gurson-Tvergaard-Needleman) model has been used to describe the combined aforementioned effects. The first numerical simulations-burst test comparison is encouraging regarding prediction ability ofthe model. Mots-clefs :" @default.
- W2134225742 created "2016-06-24" @default.
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- W2134225742 date "2007-01-01" @default.
- W2134225742 modified "2023-09-27" @default.
- W2134225742 title "Application du modèle GTN à l'endommagement dynamique de la structure de générateurs de gaz pour airbag" @default.
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